Market voices on:

The European single currency gained against both the US dollar and the yen.

Besides Thursday's Brexit vote, traders will be turning their attention next week to Federal Reserve Chair Janet Yellen's testimony in on the US economic outlook on Tuesday and Wednesday in Congress.

Investors are expected to closely follow her remarks for clues on future rate hikes, after the Federal Open Market Committee kept rates unchanged on Wednesday in part due to concerns about the looming Brexit referendum.

"We expect Yellen to reiterate the cautious message of last week's post-FOMC meeting press conference," Deutsche Bank analysts said in a client note.

"However, we cannot discount the risk that she will deliver a slightly more upbeat message in case she is dissatisfied with the financial markets' interpretation of the path of monetary policy."

Markets have been decidedly more bearish than the Fed on the likely path of rate hikes, pricing in lower rates for longer on signs of weakness in the US economy and slowing global growth.